The package was delivered safely months ago. I got invoiced for an insane amount long after it was delivered, attempted to explain the situation to them, and they've now responded by sending collection notices (with MY name on them!) to the buyer of the order.

Like I said before, I don't think he actually needs a lawyer, just mentioning one should be enough. Even if he does have to get one, his case is strong enough for them to not bother going (their lawyers will look at it and not want to bother).

Lawyers do not need to get involved with this. You'd end up paying them more than the bill.

Calmly and coolly continue making calls. Document each one. Obtain fax numbers that you can send proof of payment to and extensions that you can dial to confirm receipt afterwards. Reference all previous calls each time.

And send a dispute letter to a credit agency to get the collection marked as "disputed." Send a copy of the check stub along with it.

This from a company that uses a "logical scan" (it was on the last truck so it must be on the next truck) to track packages. As well as "out for delivery" (for 3 days) dosen't mean that it is on a truck headed for the customer. They are however better at tracking than USPS.

They sent me an invoice some time ago. I responded in kind with a printout from my bank detailing that I wrote them a check and confirming that they have cashed the check. And that's just what I sent to the collection agency too.

My biggest problem with UPS is that when I lived at my old apartment, occasionally I'd get an item off of ebay or somewhere else and the seller would send it UPS. I can think of about 3 separate occasions that they simply delivered the package to an address that was totally nowhere near what my address was. It was as if the driver couldn't find my apartment building and said "Screw it, I'll just deliver it here to this one." Luckily I was able to track down my packages and get them. One of them someone had even SIGNED for!